House of Representatives Democrat Elijah Cummings has told IFLR why he wants US banks to explain how they will benefit from the roll-back of swaps regulations in Dodd-Frank. The call from Cummings follows a letter he and US Senator Elizabeth Warren sent to banks on January 29, asking them to outline the scope of their swaps businesses, following a roll-back of the push-out rules, called section 630, released in December.